Digital Radiography with Digital Detector Arrays DDAs 30

Digital Radiography with Digital Detector Arrays (DDAs) 30. 04. 2013 TS / DEKRA Industrial Oy / Finland

Digital Detector Array (DDA) technique, overview - Radiographic image instantly on computer screen after exposure (no developing, no chemicals) - Results in real time / on-site; repairs can be marked during inspection and inspection can be extended based on results - Images can be shared, for example via email - Images can be stored to a database with reference information (such as photographs of location) - Measurements can be made in images and saved with images - Image processing (window leveling, sharpening, high pass filtering, magnifying) - Large dynamic range (large wall thickness differences with one exposure) - Exposure times shorter compared to traditional film technique - Reduced safety areas with low dose pulsed x-ray equipment

Digital Detector Array (DDA) technique, overview

Detector structure

Main components* of portable Vidisco DDA -system 1. CDU/computer 2. ICU 3. Detector 4. Pulsed x-ray source** * All components battery operated (also mains current can be used) ** Other radiation sources also applicable

Digital radiographic techniques, examples of applications - Weld inspection Pipeline corrosion inspection Castings Reinforced plastic / fiberglass pipes Electrical insulators and cables

Weld inspection

Pipeline corrosion inspection

Casting inspection

Reinforced plastic / fiberglass pipe inspection

Electrical insulator inspection

Detector types, Vidisco 342 x 432 mm 260 x 320 mm 222 x 222 mm 145 x 114 mm

Detector types, Vidisco

Applicable radiation sources • Traditional x-ray equipment; non-synchronized operation or synchronized operation via software (with connection cable between x-ray equipment and Vidisco equipment) • Pulsed x-ray equipment; battery operated • Gamma-ray sources (Se-75, Ir-192)

Golden Engineering XRS-3 pulsed x-ray equipment • • Battery operated Controlled with Vidisco software X-ray energy 270 k. Vp Max. penetration ~ 15 - 20 mm of steel

XRS-3 safety area 20 μSv / h Manufacturer’s recommended safety area

Status of standardization, published standards • EN ISO 17636 -2 Non-destructive testing of welds. Radiographic testing. Part 2: x- and gamma-ray techniques with digital detectors (2013) • ASME V Art. 2 Appendix IX – Application of digital radiography • ASTM E 2698 -10 Standard Practice for Radiological Examination Using Digital Detector Arrays • ASTM E 2736 -10 Standard Guide for Digital Detector Array Radiology

Image processing examples, window leveling

Image processing examples, high pass filtering

Image processing examples, high pass filtering

Image processing examples, emboss

Measurements

Thank You!